DtTimer Class Reference

Instances of DtTimer are used to maintain the information needed to represent some kind of scheduled event. The key information it maintains is a callback function to be invoked when the timer fires. It is intended to be used in conjunction with the DtScheduler class, which is responsible for determining when to fire the timer.

Note: A timer can be created, ticked, reset, etc without use of the DtScheduler.

Note: If the DtTimer is used with a DtScheduler, it is the responsibility of the destroyer of a timer to remove it from the DtScheduler before deleting it.

Inheritance diagram for DtTimer:

Public Member Functions
	DtTimer (const unsigned int type, const DtTime fireTime, const DtTimerCallbackFcn callback, void *usr)
	DtTimer (const DtTimer &orig)
DtTimer &	operator= (const DtTimer &orig)
virtual	~DtTimer ()
virtual bool	tick (const DtTime simTime)
virtual void	reset (const DtTime fireTime)
virtual void	cancel ()
virtual void	fire ()
virtual bool	fired () const
virtual DtTime	fireTime () const
virtual unsigned int	timerType () const
virtual void *	usrData ()
virtual bool	cancelled () const
virtual void	setResortPending ()
virtual void	clearResortPending ()
virtual bool	resortPending () const
virtual void	setDeleteAfterFire ()
virtual void	clearDeleteAfterFire ()
virtual bool	deleteAfterFire () const
virtual bool	managed () const
virtual void	setScheduler (DtScheduler *scheduler)
virtual bool	periodIsRealTime () const

Protected Attributes
DtScheduler *	myScheduler
const DtTimerCallbackFcn	myCallback
const unsigned int	myType
void *	myUsrData
bool	myFired
bool	myDeleteAfterFire
bool	myCancelled
DtTime	myFireTime
bool	myResortPending

Constructor & Destructor Documentation

DtTimer::DtTimer	(	const unsigned int	type,
		const DtTime	fireTime,
		const DtTimerCallbackFcn	callback,
		void *	usr
	)

constructor The type parameter is an integer assigned by the caller for debugging purposes. You can use this type when debugging to identify for what purpose the timer was intended. See timerTypes.h for a list of integers already in use by VR-Forces. fireTime is the simulation time the timer should be fired. The usr pointer points to some user-specified data that will be passed into the given callback when the timer fires. The usr pointer is owned by the caller (who is therefore responsible for destroying it) and it should not be modified by this class in any way.

DtTimer::DtTimer

(

const DtTimer &

orig

)

copy constructor

virtual DtTimer::~DtTimer ( )

virtual

destructor

Member Function Documentation

DtTimer& DtTimer::operator=

(

const DtTimer &

orig

)

assignment operator

virtual bool DtTimer::tick ( const DtTime  simTime )

virtual

If time to fire, calls fire and returns true.

virtual void DtTimer::reset ( const DtTime  fireTime )

virtual

Resets the time to fire. If myScheduler has been set, calls the scheduler's reSort() member passing in this object as the argument. Sets cancelled and fired state to false.

virtual void DtTimer::cancel ( )

virtual

Sets cancelled state to true, fired state to false. If myScheduler has been set, calls scheduler's reSort() member passing in this object as the argument.

virtual void DtTimer::fire ( )

virtual

Sets off (fires) the timer. Sets the fired state to true. If a callback exists, invokes the callback. If myScheduler has been set, calls scheduler's reSort() member passing in this object as the argument.

Reimplemented in DtRecurringTimer, and DtPeriodicTimer.

virtual bool DtTimer::fired ( ) const

virtual

Returns whether or not timer has fired.

virtual DtTime DtTimer::fireTime ( ) const

virtual

Simulation time that timer is scheduled to fire.

virtual unsigned int DtTimer::timerType ( ) const

virtual

User-specified integer used to identify the purpose of the timer. See timerTypes.h for the set of timerType integers aready in use within VR-Forces.

virtual void* DtTimer::usrData ( )

virtual

Pointer to user-specified data to be passed into callback when timer fires.

virtual bool DtTimer::cancelled ( ) const

virtual

Returns whether or not timer has been cancelled (if its cancel() member has been called).

virtual void DtTimer::setResortPending ( )

virtual

Resort pending state is used by a DtScheduler as it manages when it wants to resort the timers it is maintaining.

virtual void DtTimer::clearResortPending ( )

virtual

virtual bool DtTimer::resortPending ( ) const

virtual

virtual void DtTimer::setDeleteAfterFire ( )

virtual

Designates timer whether or not should be automatically deleted after it has fired. By default, it is up to the creator of the timer to delete the timer after it has fired. Note that if the creator of the timer assumes responsiblity for deleting timer, they cannot delete the timer in the callback (they must do it at some point after the callback has returned).

virtual void DtTimer::clearDeleteAfterFire ( )

virtual

virtual bool DtTimer::deleteAfterFire ( ) const

virtual

Indicates if timer has been configured to be automatically deleted upon firing or not (in which case creator of timer is responsible for deleting timer after it has fired). Note that if the creator of the timer assumes responsiblity for deleting timer, they cannot delete the timer in the callback (they must do it at some point after the callback has returned).

virtual bool DtTimer::managed ( ) const

virtual

Indicates whether or not timer is being managed by a DtScheduler or not. (i.e. was setScheduler ever called for this timer object)

virtual void DtTimer::setScheduler ( DtScheduler *  scheduler )

virtual

Sets the DtScheduler responsible for managing this timer.

virtual bool DtTimer::periodIsRealTime ( ) const

virtual

Whether or not to measure period in real time (vs. sim time). Default is false.

Reimplemented in DtPeriodicTimer.

Member Data Documentation

DtScheduler* DtTimer::myScheduler

protected

const DtTimerCallbackFcn DtTimer::myCallback

protected

const unsigned int DtTimer::myType

protected

void* DtTimer::myUsrData

protected

This pointer is the property of the DtTimer user and should not be modified in any way by DtTimer.

bool DtTimer::myFired

protected

bool DtTimer::myDeleteAfterFire

protected

bool DtTimer::myCancelled

protected

DtTime DtTimer::myFireTime

protected

bool DtTimer::myResortPending

protected

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The documentation for this class was generated from the following file:

• /data/exports/nrhent7-1/nightly/docs/vrForces.vrf5-1-branch/include/vrfcore/timer.h